Table 5 Statistical comparison of the gravity anomaly differences between the marine gravity models and the shipborne gravity anomalies at the checkpoints at different depths (unit: mGal).
Depths/km | Number of checkpoints | Modle | MAX | MIN | MEAN | STD | RMS | MAE |
|---|---|---|---|---|---|---|---|---|
(0, 1] | 17,861 | MLP_GRA | 26.33 | -29.10 | -0.62 | 2.55 | 2.62 | 1.87 |
SDUST2022GRA | 22.37 | -34.43 | 0.42 | 2.84 | 2.87 | 2.09 | ||
SIO_V32.1 | 30.85 | -30.17 | -0.13 | 3.04 | 3.04 | 2.17 | ||
DTU21GRA | 28.02 | -33.54 | 0.36 | 2.78 | 2.80 | 2.01 | ||
(1, 2] | 9251 | MLP_GRA | 34.42 | -44.33 | 0.13 | 2.96 | 2.96 | 2.00 |
SDUST2022GRA | 31.04 | -41.98 | -0.05 | 3.71 | 3.71 | 2.58 | ||
SIO_V32.1 | 32.29 | -43.40 | 0.14 | 3.80 | 3.80 | 2.59 | ||
DTU21GRA | 32.31 | -40.59 | -0.08 | 3.83 | 3.83 | 2.62 | ||
(2, 3] | 7191 | MLP_GRA | 32.35 | -25.11 | 0.25 | 3.22 | 3.23 | 2.13 |
SDUST2022GRA | 23.90 | -33.59 | -0.44 | 3.54 | 3.57 | 2.49 | ||
SIO_V32.1 | 29.21 | -34.69 | -0.16 | 3.75 | 3.76 | 2.58 | ||
DTU21GRA | 23.68 | -36.54 | -0.37 | 3.53 | 3.55 | 2.46 | ||
(3, 4] | 10,756 | MLP_GRA | 31.78 | -27.11 | 0.18 | 2.75 | 2.75 | 1.92 |
SDUST2022GRA | 37.33 | -31.12 | -0.35 | 3.07 | 3.09 | 2.19 | ||
SIO_V32.1 | 37.03 | -28.17 | -0.06 | 3.21 | 3.21 | 2.25 | ||
DTU21GRA | 36.24 | -27.01 | -0.26 | 3.05 | 3.06 | 2.13 | ||
(4, +∞) | 2228 | MLP_GRA | 27.52 | -30.37 | 1.10 | 3.81 | 3.96 | 2.70 |
SDUST2022GRA | 25.04 | -42.36 | -0.42 | 4.42 | 4.44 | 2.86 | ||
SIO_V32.1 | 27.14 | -41.50 | 0.54 | 4.39 | 4.42 | 2.88 | ||
DTU21GRA | 24.63 | -41.15 | 0.13 | 4.36 | 4.36 | 2.77 |
